Effect of rubber shock absorber on railway and train
At the beginning of the early railway, when the train was running on it, it was often accompanied by great noise and intense vibration. At that time, because there were no good equipment components to offset or weaken these problems, with the development of science and technology, the train became a train, and the speed of operation was increasing, and the noise and vibration generated were also increasing. Therefore, composite materials separating rubber and metal are created, and one element in these composite materials is rubber shock absorber

Development of domestic stainless steel pneumatic butterfly valve industry
1. The price cost is increasing day by day. As the most important raw material of stainless steel pneumatic butterfly valve consumption, steel has entered a period of low profit with open and transparent prices. The rising steel prices will promote the consumption cost of stainless steel pneumatic butterfly valves; 2. The brand of stainless steel pneumatic butterfly valve industry in China is poor, and the competitiveness in the international market is weak. Due to the low industrial concentration, backward technology and low price competition, there is no "famous brand" in the international sense in such a huge Chinese stainless steel pneumatic butterfly valve market; 3. The fierce competition has eliminated small and medium-sized stainless steel pneumatic butterfly valve enterprises from time to time.
4. The R&D strength is weak and the capital investment is insufficient. China's technological progress is still in the 1980s abroad. Although a large number of advanced technologies and consumer lines have been introduced, the digestion and absorption of technology lacks the basic support of software and hardware.
5. Brain drain of theoretical application technology. At present, although many colleges and universities in China are engaged in scientific research, and many theoretical discussions and patent papers are of a high degree, they are not closely separated from consumption theory, and the ability to transform theory into waste products is poor.